Chloramphenicolpalmitat Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R40:Verdacht auf krebserzeugende Wirkung.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R20/21/22:Gesundheitssch?dlich beim Einatmen,Verschlucken und Berührung mit der Haut.
S-S?tze Betriebsanweisung:
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Beschreibung
Chloramphenicol palmitate is an orally bioavailable ester prodrug form of the antibiotic chloramphenicol. It is hydrolyzed in the small intestine to release chloramphenicol. Formulations containing chloramphenicol palmitate were previously used in the treatment of severe bacterial infections.
Chemische Eigenschaften
white crystals
Verwenden
Chloramphenicol palmitate is prepared by acylation of chloramphenicol with palmitic acid. Although chloramphenicol palmitate is a more hydrophobic drug which should enhance bioavailability, the primary advantage of the ester is to mask the taste of chloramphenicol in oral formulations. Chloramphenicol palmitate is significantly less active than chloramphenicol but acts as a prodrug, being readily hydrolysed by acid and esterase in the gut to release chloramphenicol.
Application
Chloramphenicol palmitate was synthesized by Parke Davis Co. in 1952. It has a much less bitter taste than chloramphenicol and is suitable for oral administration, especially for children. The palmitate shows a higher serum level after oral administration than chloramphenicol does and acts the same as chloramphenicol in vivo.
Allgemeine Beschreibung
Chloramphenicol palmitate is the palmitic acid ester ofchloramphenicol. It is a tasteless prodrug of chloramphenicolintended for pediatric use. The ester must hydrolyze invivo following oral absorption to provide the active form.Erratic serum levels were associated with early formulationsof the palmitate, but the manufacturer claims that thebioavailability of the current preparation is comparable tothat of chloramphenicol itself.
Sicherheitsprofil
Moderately toxic by
oral route. An experimental teratogen. Other
experimental reproductive effects. An
antibiotic. When heated to decomposition it
emits very toxic fumes of NOx and Cl-. See
also other chloramphenicol entries.
l?uterung methode
The palmitate crystallises from *benzene or xylene with m 105-106o and [] D –39.5o (c 2, Et2O), max 267.3nm. [Edgerton et al. J Am Chem Soc 77 27 1955, Beilstein 13 IV 2753.]
Chloramphenicolpalmitat Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
